McLeod RST Twin Disc Street/Strip Clutch Kit – GM 1-1/8" x 10 Spline | Small Diameter Flywheel Only | 6913-04

McLeod Racing’s RST twin disc street/strip clutch kit for GM manual transmission applications using the 1-1/8" x 10 spline input shaft specification. The RST is McLeod’s performance street/strip clutch — a twin-disc design engineered for high-torque GM V8 applications where a single-disc clutch has reached its torque capacity limit. Covers a wide range of Chevrolet, Buick, Oldsmobile, and Pontiac vehicles from the late 1950s through the early 1980s equipped with compatible GM manual transmissions.

Critical: This clutch kit is designed for use with a small diameter (11") flywheel only. It is not compatible with large diameter (12") flywheel applications. Confirm your flywheel diameter before ordering — installing this clutch with an incompatible flywheel will result in improper clutch function.

McLeod RST — What It Is

The McLeod RST (Race Street Twin) is a twin-disc clutch kit designed for high-performance street and strip use — applications where a stock or single-disc performance clutch cannot handle the torque output of a modified V8. Twin-disc clutch designs use two friction discs instead of one, effectively doubling the friction surface area and significantly increasing torque capacity without requiring a proportional increase in clamp load. The result is a clutch that can handle substantially more torque than a single-disc unit while maintaining a pedal effort that is manageable for street driving — unlike a full race clutch, which typically requires very high pedal effort unsuitable for daily or street use. The RST is the correct choice for a high-output GM V8 build — modified small block or big block — where the factory or single-disc clutch is slipping or has been identified as the drivetrain’s torque capacity limit.

Key Features

• Twin Disc Design: Two friction discs provide significantly greater torque capacity than a single-disc clutch of equivalent diameter — without the extreme pedal effort of a full race single-disc unit. Engineered for high-torque GM V8 street/strip applications
• GM 1-1/8" x 10 Spline: Designed for the standard GM manual transmission input shaft specification used across a wide range of GM vehicles from the late 1950s through the early 1980s — compatible with the Muncie 4-speed, Saginaw 4-speed, and other GM manual transmissions using this input shaft spec
• Small Diameter Flywheel Only: Engineered for use with a small diameter (11") flywheel. Not compatible with large diameter (12") flywheel applications. Flywheel diameter must be confirmed before ordering
• Street/Strip Engineered: McLeod’s RST line is designed for vehicles that see both street use and strip/track use — providing the torque capacity of a performance clutch with street-appropriate pedal feel and drivability
• McLeod Racing Quality: McLeod Racing is one of the most established performance clutch manufacturers in the US — with decades of experience supplying clutch systems for drag racing, road racing, and high-performance street applications

Fitment Overview

This clutch kit fits a wide range of GM vehicles equipped with a 1-1/8" x 10 spline manual transmission input shaft and a small diameter (11") flywheel, including applications across:

• Chevrolet: Corvette, Chevelle, El Camino, Impala, Bel Air, Biscayne, Chevy II / Nova, Camaro, Malibu, and others — small block and big block V8 applications (1957–1974 range)
• Buick: LeSabre, Skylark, Apollo, Centurion, and others (1968–1979 range)
• Oldsmobile: Cutlass, Cutlass Supreme, Cutlass Salon, F85, Jetstar 88, Vista Cruiser, and others (1964–1981 range)
• Pontiac: Catalina, Bonneville, Tempest, Ventura, and others (1963–1974 range)

Fitment spans a large number of specific model year and engine combinations. Verify your specific vehicle, transmission input shaft diameter and spline count, and flywheel diameter against McLeod’s full fitment guide before ordering. Small diameter (11") flywheel required — this kit is not compatible with large diameter (12") flywheel applications.

Specifications

• Brand: McLeod Racing
• Part Number: 6913-04
• Series: RST (Race Street Twin)
• Type: Twin Disc Street/Strip Clutch Kit
• Input Shaft: GM 1-1/8" x 10 Spline
• Flywheel Compatibility: Small Diameter (11") Only
• Weight: 23 lbs

Installation Note: Professional installation by a shop experienced with GM manual transmission clutch systems is strongly recommended. Flywheel inspection and resurfacing or replacement should be performed at the time of clutch installation. Confirm input shaft spline count and diameter and flywheel diameter before ordering. A twin-disc clutch requires correct break-in procedure — follow McLeod’s break-in instructions to seat the friction discs properly before subjecting the clutch to full load.